Viscous Detection Kit for 3D PCB Residue Mapping
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Solution Overview
Problem
Current methods for detecting residues and contaminants on three-dimensional electronic objects, such as printed circuit boards, are inadequate as they either provide only overall measurements or are unsuitable for complex geometries, failing to identify local distribution of residues which can lead to corrosion and device failure.
Innovation Solution
A process involving a viscous component in an aqueous dispersion with an indicator is applied to the object's surface using a spraying technique, allowing the composition to solidify and visually differentiate residues or contaminants through color changes or fluorescent reactions, enabling effective detection on complex surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the ROSE technique is used to measure overall cleanliness, then a single conductivity value is obtained, but local distribution information of residues is lost
Solution Approach 1:
The measurement surface is divided into multiple separate measurement areas, each equipped with its own conductivity measurement unit. This segmentation allows simultaneous measurement of multiple locations, providing both overall cleanliness assessment and local distribution information without sacrificing measurement speed.
Solution Approach 2:
The measurement approach transitions from a single-point or overall measurement to a distributed multi-point measurement system. By adding the spatial dimension of multiple measurement locations, the system achieves both overall conductivity assessment and local residue distribution mapping.
2Measurement precision
If the Local Residue Detection Technique is used to measure specific areas, then local distribution information is obtained, but measurement time increases significantly
Solution Approach 1:
The measurement system is segmented into multiple parallel measurement units that can operate simultaneously at different locations. This allows the system to measure multiple areas in parallel rather than sequentially, maintaining local distribution information while significantly reducing total measurement time.
Solution Approach 2:
The measurement process continues simultaneously at multiple locations without interruption. While one area is being measured, other areas are being measured in parallel, ensuring continuous productive measurement action throughout the entire inspection process.
3Reliability
If gel corrosion testing is used on flat surfaces, then corrosion detection is possible, but the method fails on three-dimensional objects with complex geometry
Solution Approach 1:
The measurement system is divided into multiple independent measurement units that can be positioned at different locations and orientations. This segmentation allows the system to adapt to three-dimensional objects by measuring different surfaces and angles independently, maintaining corrosion detection accuracy on complex geometries.
Solution Approach 2:
The measurement system employs flexible positioning capabilities that allow adaptation to various surface geometries. The measurement units can be dynamically positioned and oriented to accommodate three-dimensional objects, ensuring reliable corrosion detection on complex shapes while maintaining the method's core functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for precise identification of residues and contaminants on uneven surfaces, providing critical information on thermal profiles and chemical usage during soldering, thereby enhancing the reliability and longevity of electronic devices.
Implementation Method 1
an indicator for detecting production residues or service life contaminants in a fluent state is applied by spraying on the surface of said object to be investigated, said composition is allowed to solidify, said residues or contaminants are identified as areas where said solidified composition visually differs from remaining composition due to a reaction product between said production residues or service life contaminants and the indicator
Implementation Method 2
visually differs from remaining composition due to a reaction product between said production residues or service life contaminants and the indicator
Implementation Method 3
a composition comprising a viscous component in an aqueous dispersion and an indicator for detecting production residues or service life contaminants in a fluent state is applied by spraying on the surface of said object to be investigated, said composition is allowed to solidify
Data Source
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AI summary
The invention relates to a process for detecting production residues or service life contaminants in an object with three-dimensional geometry wherein: - a composition comprising a viscous component in aqueous dispersion and an indicator for detecting production residues or service life contaminants in a fluent state is applied by spraying on the surface of said object to be investigated, - said composition is allowed to solidify, - said residues or contaminants are identified as areas, where said solidified composition visually differs from remaining composition due to a reaction product between said production residues or service life contaminants and the indicator; a kit for use in the process comprising: - a container having spraying equipment - a viscous component in aqueous dispersion - an indicator for detecting production residues or service life contaminants; and a composition for use in the process detecting residues from the production process in an electronic object comprising comprising either: - a viscous component in aqueous dispersion and - an pH indicator for detecting flux residues from a soldering process, or - a viscous component in aqueous dispersion - an indicator for detecting a salt or an ion.